Class: ZendeskAPI::Middleware::Request::Retry

Inherits:
Faraday::Middleware
  • Object
show all
Defined in:
lib/zendesk_api/middleware/request/retry.rb

Overview

Faraday middleware to handle HTTP Status 429 (rate limiting) / 503 (maintenance)

Constant Summary collapse

DEFAULT_RETRY_AFTER = 
10
ERROR_CODES = 
[429, 503]

Instance Method Summary collapse

Constructor Details

#initialize(app, options = {}) ⇒ Retry

Returns a new instance of Retry.



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# File 'lib/zendesk_api/middleware/request/retry.rb', line 13

def initialize(app, options={})
  super(app)
  @logger = options[:logger]
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/zendesk_api/middleware/request/retry.rb', line 18

def call(env)
  original_env = env.dup
  response = @app.call(env)

  if ERROR_CODES.include?(response.env[:status])
    seconds_left = (response.env[:response_headers][:retry_after] || DEFAULT_RETRY_AFTER).to_i
    @logger.warn "You have been rate limited. Retrying in #{seconds_left} seconds..." if @logger

    seconds_left.times do |i|
      sleep 1
      time_left = seconds_left - i
      @logger.warn "#{time_left}..." if time_left > 0 && time_left % 5 == 0 && @logger
    end

    @logger.warn "" if @logger

    @app.call(original_env)
  else
    response
  end
end